CN218648786U - Direct current busbar for photovoltaic system - Google Patents
Direct current busbar for photovoltaic system Download PDFInfo
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- CN218648786U CN218648786U CN202223190114.6U CN202223190114U CN218648786U CN 218648786 U CN218648786 U CN 218648786U CN 202223190114 U CN202223190114 U CN 202223190114U CN 218648786 U CN218648786 U CN 218648786U
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- 238000009413 insulation Methods 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model provides a direct current bus bar for photovoltaic system, including anodal integrated bus and negative pole integrated bus, anodal integrated bus includes anodal generating line, anodal branch group and anodal confluence node, and negative pole integrated bus includes negative pole generating line, negative pole branch group and negative pole confluence node; the two integrated buses are respectively and orderly arranged on two sides of the photovoltaic assembly string and are respectively connected with the positive electrode and the negative electrode of the connector of each assembly in the photovoltaic assembly string nearby, so that the length of the copper core cable of the connector is reduced, the field wiring and installation work is simplified, the working efficiency is improved, and the system cost is reduced; the integrated bus is detachably provided with a plurality of nodes, supports multi-path current collection, and can be flexibly configured to increase and decrease access points; the components are not in a mutual influence connection relation; all set up a fuse module before every photovoltaic group cluster converges, can play the effect of insurance protection, the photovoltaic group cluster that the protection corresponds does not receive the damage of the condition of overflowing.
Description
Technical Field
The utility model relates to the field of photovoltaic technology, especially, relate to a direct current busbar for photovoltaic system.
Background
A typical solar photovoltaic power generation system is composed of a solar cell array (module), a cable, a power electronic converter (inverter), an energy storage device (battery), a load (user), and the like. The solar cell array and the energy storage device are power supply systems, the controller and the power electric converter are control protection systems, and the load is a system terminal. The minimum unit for photoelectric conversion is a solar cell monomer which cannot be independently used as a power supply, in a photovoltaic power generation system, the solar cell monomer needs to be connected in series, in parallel and packaged to form a solar cell module, the power of the solar cell module can be from several watts to several hundred watts, and the solar cell module can be independently used as the power supply; the solar cell array is formed by connecting solar cell groups in series and in parallel and then mounting the solar cell groups on a support, can output hundreds of watts, thousands of watts or even higher power, and is an electric energy generator of a photovoltaic power generation system.
The solar cell array is composed of a plurality of component strings which are connected by individual components. In the existing assembly connection, the positive and negative connectors on the assembly junction box are generally connected in series end to end, and finally connected with a bus bar; therefore, the electrical connection effect, the current carrying capacity and the like of the photovoltaic module string depend on the series connection effect of the terminal box connector, and if any one connection part in the module string has a problem, such as a certain part has an open circuit, the whole module string can be separated from the photovoltaic system, and the power generation capacity is damaged; moreover, in the current assembly connection system, the connector cable of the junction box is not fixed by a fixed point formed by adhering and fixing the junction box and the assembly, and has no extra cable fixing structure, so that in the whole assembly series connection system, the connector cable is always in a loose suspension state, and in the windy weather and daily maintenance process, the problem that the connector is disconnected is easily caused, and even the junction box is pulled down from the assembly, and other serious problems can be caused. In addition, the existing connector cable is generally a copper core cable, and in order to reduce the cost of the photovoltaic system, aluminum core cables are continuously popularized to replace the copper core cables, and reducing the use of the copper core cables in the photovoltaic system as much as possible is one of important ways for reducing the cost of the photovoltaic system.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems and the application requirements in the connection of the prior photovoltaic system, the utility model aims to provide a direct current bus bar for the photovoltaic system, which can improve the reliability of the system connection and reduce the associated influence caused by poor connection between the components; and the length of the copper core cable of the connector can be reduced, and the cost is reduced, so that the cost of the photovoltaic system is reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a direct current bus bar for a photovoltaic system comprises a positive integrated bus bar and a negative integrated bus bar;
the positive integrated bus comprises a positive bus, a positive branch line group and a positive bus node; the positive bus bar is arranged on one side of the positive pole of the photovoltaic group string, a plurality of positive pole confluence nodes are detachably arranged on the positive bus bar, the positive pole branch line groups, the photovoltaic group string and the positive pole confluence nodes are in one-to-one correspondence, one end of each positive pole branch line group is connected to a positive pole interface of the corresponding photovoltaic group string, and the other end of each positive pole branch line group is connected to the corresponding positive pole confluence node; the anodes of all the photovoltaic group strings are connected to the anode bus bar through the anode branch line group;
the negative integrated bus comprises a negative bus, a negative branch line group and a negative bus node; the negative bus is arranged on one side of the negative electrode of the photovoltaic group string, a plurality of negative bus nodes are detachably arranged on the negative bus, the negative branch line groups, the photovoltaic group string and the negative bus nodes are in one-to-one correspondence, one end of each negative branch line group is connected to a negative interface of the corresponding photovoltaic group string, the other end of each negative branch line group is connected to the corresponding negative bus node, and the negative electrodes of the photovoltaic group string are connected to the negative bus through the negative branch line groups;
and a fuse module is connected between each positive pole branch group and the corresponding positive pole bus node, and a fuse module is connected between each negative pole straight group and the corresponding negative pole bus node.
Preferably, the number of the positive branch lines in the positive branch line group is equal to the number of the positive interfaces of the photovoltaic group string connected with the positive branch line; the number of the cathode branch lines in the cathode straight line group is equal to the number of the cathode interfaces of the photovoltaic group string connected with the cathode branch lines.
Preferably, one end of the positive bus is connected to the inverter, and the other end of the positive integrated bus is of an insulation structure with a choke plug not leading out; one end of the negative bus is connected to the inverter, and the other end of the negative integrated bus is of an insulation structure with a choke plug not leading out.
Preferably, the insulation structure is a detachably mounted insulation sleeve, an insulation cap or a plurality of layers of insulation glue.
Preferably, positive voltage pressing terminals are crimped at two ends of the positive bus bar node, and the positive bus bar node is connected with the positive bus bar in a plugging manner; and the two ends of the negative bus bar node are connected with negative line pressing terminals in a pressing mode, and the negative bus bar node is connected with the negative bus bar in a plugging mode.
Preferably, the positive bus bar is formed by connecting a plurality of sections of thick cables through positive bus nodes, and the lengths of the thick cables are the same; the negative bus is formed by connecting a plurality of sections of thick cables through negative bus nodes, and the lengths of the thick cables are the same.
Preferably, one end of the positive branch line is provided with an interface and is connected with the positive interface of the photovoltaic string; one end of the negative pole branch line is provided with an interface and is connected with the negative pole interface of the photovoltaic group string.
Preferably, the fuse module is detachably mounted on the positive and negative bus nodes.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the direct current bus bar is divided into a positive electrode integrated bus bar and a negative electrode integrated bus bar, positive and negative electrode currents are separately converged and are respectively connected with the positive and negative electrodes of the connector of each assembly in the photovoltaic assembly string, on one hand, the interfaces on the two sides of the positive and negative electrodes of the connector can be connected nearby, the cable arrangement is more concise and attractive, the problem of messy cables is further avoided, and the failure rate and the operation and maintenance cost are reduced; the length of the copper core wire cable of the connector can be reduced; on the other hand, the two buses with thicker diameters are used for converging the assembly current, the current which can pass through is larger, and the connection strength of a connection system can be ensured;
2. the positive integrated bus and the negative integrated bus of the utility model are both detachably provided with a plurality of nodes, support the multi-path current collection, and can be flexibly configured to increase and decrease access points; the components are not mutually influenced in connection, so that even if one component breaks down and is disconnected, the other components are not influenced to normally generate electricity and output;
3. the utility model discloses all set up a fuse module before every photovoltaic group cluster converges, can play the effect of insurance protection, the photovoltaic group cluster that the protection corresponds does not receive the damage of the condition of overflowing, safety and stability more.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a photovoltaic system using a DC bus bar;
fig. 2 is a schematic structural view of a dc bus bar for a photovoltaic system.
Detailed Description
In order to further understand the objects, structures, features, and functions of the present invention, the following embodiments are described in detail.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 and fig. 2, a dc bus bar for a photovoltaic system includes a positive integrated bus bar 1 and a negative integrated bus bar 2. The anodes of all the photovoltaic string 4 are connected to the anode integrated bus bar 1 for confluence, and the cathodes of all the photovoltaic string 4 are connected to the cathode integrated bus bar 2 for confluence.
The positive integrated bus 1 comprises a positive bus 11, a positive branch line group 12 and a positive bus node 13; the positive bus 11 is installed on one side of the positive electrode of the photovoltaic group string 4, the positive bus 11 is detachably provided with a plurality of positive bus nodes 13, the positive branch line groups 12, the photovoltaic group strings 4 and the positive bus nodes 13 are in one-to-one correspondence, one end of each positive branch line group 12 is connected to the positive electrode interface 41 of the corresponding photovoltaic group string 4, and the other end of each positive branch line group 12 is connected to the corresponding positive bus node 13; the anodes of all the photovoltaic string 4 are connected to the anode bus bar 11 through the anode branch line group 12.
All the interfaces of the positive terminal of each photovoltaic string 4 are connected to the corresponding positive bus node 13 in a summary manner through the positive branch line group 12, so that the branch current is merged into the total current. The positive terminals of all the photovoltaic string strings 4 are connected to the positive bus bar 11, in this case, there is only one positive bus bar 11 and a plurality of positive branch lines in the positive branch line group 12, and the positive branch lines are short and can orderly arrange, connect and reinforce the positive terminals of all the photovoltaic string strings 4.
The cathode integrated bus bar 2 includes a cathode bus bar 21, a cathode branch line group 22, and a cathode bus node 23; the cathode bus bar 21 is installed on one side of the cathode of the photovoltaic group string 4, the cathode bus bar 21 is detachably provided with a plurality of cathode bus nodes 23, the cathode branch line groups 22, the photovoltaic group string 4 and the cathode bus nodes 23 are in one-to-one correspondence, one end of each cathode branch line group 22 is connected to the cathode interface 42 of the corresponding photovoltaic group string 4, the other end of each cathode branch line group 22 is connected to the corresponding cathode bus node 23, and the cathodes of the photovoltaic group strings 4 are connected to the cathode bus bar 21 through the cathode branch line groups 22.
Similarly to the positive pole, all the negative terminals of each string 4 are connected together to the corresponding negative bus node 23 via the negative branch group 22, so that the branch current is merged into the total current. The negative terminals of all the photovoltaic strings 4 are connected to the negative bus bar 21, in this case, there is only one negative bus bar 21 and a plurality of positive branches in the negative branch group 22, and the positive branches are short and can orderly arrange, connect and reinforce the positive terminals of all the photovoltaic strings 4.
A fuse module 3 is connected between each positive branch line 12 group and the corresponding positive bus node 13, and a fuse module 3 is connected between each negative straight line group and the corresponding negative bus node 23. This structure guarantees that every photovoltaic group cluster 4's positive pole and negative pole all have overcurrent protection before converging, prevents that a photovoltaic group cluster 4 out of the question from leading to whole busbar all to break down, strengthens the utility model discloses a busbar's security and reliability converge. In addition, every confluence node sets up a fuse module 3, when a certain node goes wrong, can discover the problem node fast like this, in time maintains or changes, raises the efficiency.
In one embodiment, the number of positive branches in the positive branch line group 12 is equal to the number of positive interfaces 41 of the pv string 4 connected thereto; the number of negative branch lines within the negative linear group 22 is equal to the number of negative interfaces 42 of the photovoltaic group string 4 connected thereto. The positive pole branch line group 12 and the negative pole branch line group 22 may be composed of a plurality of branch line thin cables for connecting the photovoltaic string 4. Preferably, one end of the positive branch line is provided with an interface and is connected with the positive interface 41 of the photovoltaic string 4; one end of the negative branch line is connected with the negative interface 42 of the photovoltaic string 4.
In one embodiment, one end of the positive bus 11 is connected to the inverter 5, and the other end of the positive integrated bus 1 is an insulating structure 6 with a choke plug not leading out; one end of the negative bus 21 is connected to the inverter 5, and the other end of the negative integrated bus 2 is an insulation structure 6 with a choke plug not leading out. The insulating structure 6 can be a clamped insulating cap, an insulating sleeve or a stuck multilayer insulating glue and other structures, and the anode bus 11 or the cathode bus 21 is convenient to disassemble and assemble.
In one embodiment, positive voltage line terminals 131 are pressed at two ends of the positive bus node 13, and the positive bus node 13 is connected with the positive bus bar 11 in a plugging manner; negative electrode bus node 23 has negative electrode lead terminals 231 press-fitted to both ends thereof, and negative electrode bus bar 21 is connected to negative electrode bus node 23 by insertion and removal. The efficiency of installation is improved, the reliability of installation is strengthened to alleviate the cost of fortune dimension.
In one embodiment, the positive bus bar 11 is formed by connecting a plurality of sections of thick cables through a positive bus node 13, and the lengths of the thick cables are the same; the negative bus bar 21 is formed by connecting a plurality of sections of thick cables through a negative bus node 23, and the lengths of the thick cables are identical except for the length of each section. The structure can flexibly change the distance between two adjacent anode bus nodes 13 or two adjacent cathode bus nodes 23 according to the actual situation, support multi-path current collection, flexibly configure and increase or decrease access points.
In one embodiment, the fuse module 3 is detachably mounted on the positive bus node 13 and the negative bus node 23, so as to facilitate installation, replacement and maintenance, and achieve a good protection effect.
To sum up, the utility model discloses an adopt anodal integrated bus-bar and negative pole integrated bus-bar to converge to the positive pole electric current and the negative pole electric current utmost point of photovoltaic group cluster respectively, positive, negative pole integrated bus-bar is connected with the positive negative pole of the connector of every subassembly in the photovoltaic module cluster respectively, make the interface of the positive negative pole both sides of connector can both be connected nearby on the one hand, connector cable arrangement is succinct more pleasing to the eye, and the length of copper core cable for the connector can show to reduce, further avoids the numerous and disorderly problem of cable, reduces fault rate and fortune dimension cost; on the other hand, the two buses with thicker diameters are used for converging the assembly current, the current which can pass through is larger, and the connection strength of a connection system can be ensured; the integrated bus can adopt an aluminum core cable, so that the system cost is reduced; the positive integrated bus and the negative integrated bus of the utility model are both detachably provided with a plurality of nodes, support the multi-path current collection, and can be flexibly configured to increase and decrease access points; the components are not mutually influenced in connection, so that even if one component breaks down and is disconnected, the normal power generation output of other components is not influenced; additionally, the utility model discloses all set up a fuse module before every photovoltaic group cluster converges, can play the effect of insurance protection, the photovoltaic group cluster that the protection corresponds does not receive the damage of the condition of overflowing, safety and stability more.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (8)
1. The utility model provides a photovoltaic is direct current busbar for system which characterized in that: the device comprises a positive integrated bus and a negative integrated bus;
the positive integrated bus comprises a positive bus, a positive branch line group and a positive bus node; the positive bus bar is arranged on one side of the positive pole of the photovoltaic group string, a plurality of positive pole confluence nodes are detachably arranged on the positive bus bar, the positive pole branch line groups, the photovoltaic group string and the positive pole confluence nodes are in one-to-one correspondence, one end of each positive pole branch line group is connected to a positive pole interface of the corresponding photovoltaic group string, and the other end of each positive pole branch line group is connected to the corresponding positive pole confluence node; the anodes of all the photovoltaic group strings are connected to the anode bus bar through the anode branch line group;
the negative integrated bus comprises a negative bus, a negative branch line group and a negative bus node; the negative bus is arranged on one side of the negative electrode of the photovoltaic group string, a plurality of negative bus nodes are detachably arranged on the negative bus, the negative branch line groups, the photovoltaic group string and the negative bus nodes are in one-to-one correspondence, one end of each negative branch line group is connected to a negative interface of the corresponding photovoltaic group string, the other end of each negative branch line group is connected to the corresponding negative bus node, and the negative electrodes of the photovoltaic group string are connected to the negative bus through the negative branch line groups;
and a fuse module is connected between each positive pole branch group and the corresponding positive pole bus node, and a fuse module is connected between each negative pole straight group and the corresponding negative pole bus node.
2. The dc bus bar for a photovoltaic system according to claim 1, wherein: the number of the positive branch lines in the positive branch line group is equal to the number of the positive interfaces of the photovoltaic group strings connected with the positive branch line group; the number of the negative branch lines in the negative straight line group is equal to the number of the negative interfaces of the photovoltaic group strings connected with the negative branch lines.
3. The dc bus bar for photovoltaic system according to claim 1, wherein: one end of the positive bus is connected with the inverter, and the other end of the positive integrated bus is of an insulation structure with a choke plug not leading out; one end of the negative bus is connected to the inverter, and the other end of the negative integrated bus is of an insulation structure with a choke plug not leading out.
4. The dc bus bar for photovoltaic system according to claim 3, wherein: the insulation structure is an insulation sleeve, an insulation cap or a plurality of layers of insulation glue which are detachably arranged.
5. The dc bus bar for photovoltaic system according to claim 1, wherein: positive wire pressing terminals are pressed at two ends of the positive bus bar node, and the positive bus bar node is connected with the positive bus bar in a plugging manner; and the two ends of the negative electrode bus node are connected with negative electrode pressing line terminals in a pressing mode, and the negative electrode bus node is connected with the negative electrode bus in a plugging mode.
6. The dc bus bar for photovoltaic system according to claim 5, wherein: the positive bus is formed by connecting a plurality of sections of sectional thick cables through positive bus nodes, and the lengths of the thick cables are the same; the negative bus is formed by connecting a plurality of sections of thick cables through negative bus nodes, and the lengths of the thick cables are the same.
7. The dc bus bar for a photovoltaic system according to claim 1, wherein: one end of the positive branch line is provided with an interface and is connected with the positive interface of the photovoltaic group string; one end of the negative pole branch line is provided with an interface and is connected with the negative pole interface of the photovoltaic group string.
8. The dc bus bar for photovoltaic system according to claim 1, wherein: the fuse module is detachably mounted on the positive electrode bus node and the negative electrode bus node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223190114.6U CN218648786U8 (en) | 2021-12-16 | 2022-11-30 | Direct current bus bar for photovoltaic system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123165788 | 2021-12-16 | ||
| CN2021231657886 | 2021-12-16 | ||
| CN202223190114.6U CN218648786U8 (en) | 2021-12-16 | 2022-11-30 | Direct current bus bar for photovoltaic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN218648786U true CN218648786U (en) | 2023-03-17 |
| CN218648786U8 CN218648786U8 (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223190114.6U Active CN218648786U8 (en) | 2021-12-16 | 2022-11-30 | Direct current bus bar for photovoltaic system |
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| Country | Link |
|---|---|
| CN (1) | CN218648786U8 (en) |
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- 2022-11-30 CN CN202223190114.6U patent/CN218648786U8/en active Active
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| CN218648786U8 (en) | 2023-05-05 |
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| CU01 | Correction of utility model |
Correction item: National priority Correct: 202123165788.6 2021.12.16 CN Number: 11-02 Page: The title page Volume: 39 Correction item: National priority Correct: 202123165788.6 2021.12.16 CN Number: 11-02 Volume: 39 |
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| CU01 | Correction of utility model |